4 Lumbar Vertebrae Model with Nerve Branches, 7.25" Capacity_125mL letting students see the plate

letting students see the plate stack and watch electrolyte action through the side wall

Optical-grade rectangular glass block at 115 by 65 by 18mm

Cast iron 500g mass carries a retractable hook for suspension from spring scales

a teaching aid for ionic-bonding and crystal-geometry visualization

showing how inclination shifts from horizontal at the equator to vertical at the poles

4 Lumbar Vertebrae Model with Nerve Branches, 7.25" Capacity_125mL letting students see the plateFour natural size lumbar vertebrae stack on a mounted base with extending spinal nerve branches for teaching lumbar anatomy, lower back pain, and sciatica pathways.